2009 Fiscal Year Final Research Report
Effects of Texture and Grain Boundary Microstructures on High Temperature Deformation of Textured Alumina
| Project/Area Number |
19760497
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
MORITA Koji National Institute for Materials Science, ナノセラミックスセンター, 主幹研究員 (20354186)
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| Project Period (FY) |
2007 – 2009
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| Keywords | セラミックス / アルミナ / 高温変形 / 配向組織 / 粒界構造 / 粒内塑性 |
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| Research Abstract |
This study was performed to examine the effect of the texture and grain boundary structures on the high-temperature flow behavior of textured alumina (τ-Al_2O_3) polycrystals. The flow behavior of the textured τ-Al_2O_3 depends on the angle ￡pbetween the tensile direction and the c-plane. The textured τ-Al_2O_3 with ￡p= 45° deforms at several times higher strain rate than that of the non-textured τ-Al_2O_3. The enhanced strain rate can be related to relaxation caused by the c-plane plastic flow.
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